Pressure cut-off for gas-burners.



' No. 652,365. Patented June 26, 1900.

W. JAMES.

PRESSUBECUT-OFF FOB GAS BURNEBS.

(Application filed Oct. 80, 1899.)

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'tional View on the line 2 2 in Fig. 1.

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WILLIAM JAMES, OF ST. LOUIS, MISSOURI, A SSIGN OR OF ONE-FOURTH TO S. J.WARD, OF MEMPHIS, TENNESSEE.

PRESSURE CUT-OFF FOR GAS -BURNERS.

ISPEGIFIGATION forming part of Letters Patent No. 652,365, dated June26, 1900.

Application filed October 30, 1899- Serial No. 735,214. (No model.)

To all whom it may concern.-

Beit known that I, WILLIAM JAMES, of the city of St. Louis, State ofMissouri, have invented certain new and useful Improvements in AutomaticCut-0ft Valves for Gas-Supply Pipes, of which the following is a full,clear, and eXact description, reference being had to the accompanyingdrawings, forming a part hereof.

This invention relates to automatic cut-cit valves for gas-supply pipes;and it consists of the novel construction, combination, and arrangementof parts hereinafter shown, described, and claimed.

The object of this invention is to provide an automatic cut-off valvefor gas-supply pipes which when the flow of gas is stopped from anycause automatically closes the escapement-valve, thereby preventing acontinuation of the flow until the escapement is reopened by someexternal agency.

Figure 1 is a vertical sectional View showing the arrangement of thecomponent parts of my invention. Fig. 2 is a horizontal see- Fig. 3 is ahorizontal sectional view on the line 3 3 in Fig. 1.

In the construction of my invention I provide a rectangular metalliccase 1, consisting of two parts 2 3, on the meeting edges of which arethe flanges 4 5. Through these flanges are a plurality of threadedapertures 6 for the screws 7, which serve tohold the two parts securelytogether. In the bottom of the case thus formed is a threaded aperture8, and extending inwardly around said aperture is the threaded flange 9.Into this aperture is threaded the tube 10.

11 is a tube having a flange 12 at the bottom, apertures through saidfiange,and screws 13 passing through said apertures and securing saidtube to the bottom of the case 1. A plurality of apertures 14: areprovided in the side of said tube, the purpose of which is hereinafterdescribed. An integral upwardlyextending standard 15 is provided on oneside of the tube 11, to which is pivoted the locking-lever 16, integralwith which is the projection 17. The lever 16 operates in a 'slot 18 inthe top of the tube 11.

A cap 19, having a rubber packing 20 in its upper end, fits loosely overthe tube 10, and the lower end of the lever 16 rests on the top of saidcap. The cap 19 is retained in its position over the top of the tube 10by the tube 11.

A support or standard 21, having an aperture 22 in its outer end, issoldered or otherwise secured to the side of the tube 11. In

direct vertical alinement with the aperturev which rests on the standardor support 21 and the upper end against the plate 27. Said spring whenin its normal or expanded posi tion presses the rod 24 upward, therebyforcing the valve 28 closely against the top of the case 1. The lowerend of the rod 24 projects into a tube 30 in directvertical alinementwith the apertures 22 23. A rod 31 is rigidly secured to the plate 25,projects outwardly through a guide-loop 32, and is provided with a smallchain 33, which is attached to its outer end. A gas-jet 345 is threadedinto an aperture 35 in the top of the case 1.

The operation of the device is'as follows: When the valve 36 is opened,the gas flows into the tube 10. There further passage is prevented bythe cap and packing 19 20, which is held securely pressed over the topof the tube 10 by the locking-lever 16, which assumes a verticalposition when the rod 24: is in its normal or upper position. When it isdesired to light the gas, the chain is engaged and pulled downwardly,thereby forcing the rod 2% downwardly, together with the parts theretojoined. The plate 27 comes in contact with the projection 17 on thelever 16, and the free end of said lever is raised in the position shownin the drawings. The pressure of the gas from within the tube 10 raisesthe cap 19, and the gas escapes into the tube 11, thence through theapertures 14 into the case 1, and upwardly through the jet 31, which maythen be lighted. When the chain 33 is disengaged, the rod 24 is againforced up wardly, the valve 28 being pressed against the case 1, therebypreventing the escape of gas through the aperture 23. When the lever 16and cap 19 have been thus positioned, the pressure of the gas retainsthem there; but when-by any means the flow of gas isprevented they sinkagain into their normal position, and the external agency-must againoperate to raise the lever 16 before the gas will again flow. By thesemeans the escape of gas through defective valves is obviated. Thisdevice may be applied to the gas-pipe at any place, and it is notnecessary that it be applied near the terminal of said pipe.

A device of this kind is very simple, easily applied in any positiondesired, and costs littlein manufacture. Much inconvenience and dangerto life maybe obviated by use of these appliances, which are believed topresent many advantages over other devices of this nature.

- I claim--- 1. Acut-off valve for gas-supply pipes, comprising acase,'an escapement-tube projecting into said case, a cap fitting oversaid tube, a perforated tube fitting over and around said tube and cap,a locking-lever pivoted to a projection from said perforated tubeandoperating in a slot in the top of said tube, said locking-lever normallylocking the cap over the top of the escapement-tube, and a means wherebythe cap and locking-key may be thrown into an unlocked position,substantially as specified.

2. In a device of the class described, a device for unlocking the lever16 and the cap 19, consisting of a rod projecting through an aperture inthe top of the case, suitable rubber valves attached to plates above andbelow the top of the case, the lower of which plates when loweredpresses an arm of the locking-lever downwardly thereby raising andunlocking the other arm of the lever, a spring which normally holds thelower of said plates closely against the top of the case, and an armattached to the upper of said plates for lowering said rod,substantially as and for the purpose specified. I

In testimony whereof I affix my signature in presence of two witnesses.

' WILLIAM JAMES. Witnesses:

JOHN C. I-IIGDON, JOHN D. RIPPEY.

